I am sorry, but the 3807943 X4 blades are no longer available from Volvo Penta. I looked around and was unable to find anyone who has this blade.
I can supply the 3807944 blades however. I do have a complete X4 prop set (blades and hub) (see attached quote).
However, once the prop sets are all sold Volvo Penta will not be making any new ones. They are discontinuing the XDP drives completely.
Please let me know what you would like us to do.
J. D. Neeson